Hold-open device for doors.



5L PETERSON. How OPEN DEVICE 50B DOORS,

` l .I l I Y APPLICATION FILED OCT.v 23. 1915. www v v mi um Feb. 1, 1916 2 SHEETS-SHEET l.

1. PUERSON. A How OPEN DEVICE Fok noons. APPLICAHON FILED OCT. 23, 1915.

Patented Feb. 1,` 1916.

2 SHEETS-SHEET 2.

- ya @L 5 msm/woz urn earns ie JOHN PETERSON, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TOWTHE AMERICAN HARDWARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, A CORPORATION F CONNECTICUT.

'HOLD-OPEN DEVICE FOR DOORS.

Lituanie Specification of Letters latent.

` Patented Feb. 1,1916.

i To all whom/t may concern.

Be it known that I, Joni: Pnrnnson, a

'citizen ol the United States of America, re-

lily invention relates to new and useful improvements .in devices for holding; doors `ajar and adapted especially for association with the usual well known door checks and closers, wherein the door checkl and closer carries a lever arm and is usually provided with a link for connecting the outer end thereof with ythe door casing".

My improved device is exceedingly simple, may be cheaply made, and may be adjusted to held the door open at any desired angle.

In the drawings: Figure l is a plan View ot' my new and improved door holder in one preferred form. Figi i). is an edgeiele vation of the parts'shown at the upper c nd ci' Fig. l. Fig. 3 is a section on the line i5-5, of l. Fig. Ll is a planview of another' form of my invention. Fig. 5 is a section on thee line 5 5, of Fig. il. Fig. 6 is a plan view ot still another former' moditication. Fig. 7 is a section on the. line 7:7, of Fig. 6.

I Referring irst to the construction shown in Figs. l, 2 and l represents the usual lever arm such as commonly employed on a door check and closer. 2 is the usual eX- tensible link. Ordinarily, the door check is carried by the door to be controlled-while the end olif thejlink 2 is connected suitably to the overhead door casing, as indicated at 3. The outer ends of the arm l and link 2 are pivotally connected by a suitable pivot pin l. In this particular instance. the outer end of the arm l is turned back to form a slot into which the outarend of the link 2 extends. The outer end of the link 2 isv flattened to form a disk-like portion 5 which is tapered as best seen in Fig. 2 to form a wedge or cam surface. The pivot pin 4 passes throng? the disk portion 5 to form a hinge joint.

6 is a friction Shoe carried by the arm l and projecting into the slot adjacent to the surface of the disk portion 5. This shoe is preferably adjustable by an adjusting screw 7. lObviousl as the arms l, 2 swing apart, a. thicker portion of the disk 5 will be presentedto the shoe 6 until the parts nally wedge and thereby 4rictionally hold the arms l, 2

The wedging action is effected wholly independent ol the pivot, and hence the latter is Vnotsubjected; to undue strain.

,Inthat form of `my invention shown in Figs. i and 5, la is the lever arm, 2 is the link arm, 4' Iis the pivot pin, 5a is the disk, 6a the friction shoe, and 7a is the adjustingr screw.` In this yparticular construction,

Athe friction disk 5a istormed on the lever arm l instead of 0n the link arm 2, and the shoe G and adjusting' screw 7a are carried by the arm 2a instead of by the lever arm la. In this case the disk 5? is mounted eccentric to the' axis of the pivot pin 4a, so

that the cam or wedge action may be caused to occur `at the edge of the disk 5a instead' of on the upper or lower surface, as in Fig. l. These modifications embody the same principle et operation as disclosed 1n Fig. l.

In the form shown in Fig. 6, 1b is the lever arm, 2" is the link arm, lb is the pivot pin, 5* is the friction disk, 6b is the friction shoe, and 7l is the adj ust-ing screw. The construction of Figs. 6 and 7 is substantially the same as`construction shown in Figs. 4 and 5, save that instead of forming ormountingr the friction disk directly on `the lever arm,

it is mounted on the top of the pivot stud4?,

a limited degree of oscillating movement so j as to adapt themselves to the curve orpitch of the adjacent friction surfaces with which they coact.

In all forms of the invention" shown and described herein, the pivot pin or,stud performs solely the function of a pivot pin, and hence-possesses the maximum durability and strength.

What I claim is: e I

l; In a hold .open device for a door` two arms, a pivot for connecting the ends of said arms, a `friction shoe carried by one arm at one side of said pivot, and a friction member carried by the other arm having a cam face at a. predetermined angle 'dependllng upon the adjustment of the screw 7.

Here again, the fric? arranged to coperate with said shoe when said arms are moved apart to a certain predetermined extent.

2. In a hold open device for a door, tivo i arms, `a pivot for connecting the ends ofsaid arms, a friction shoe'carried by one arm at one side of said pivot, and a friction member carrled by the other arm having a cam face arranged to coperate with said shoe V when said arms are moved apart to a certain predetermined extent, and means for effectinge relative adjustment between said shoe carried by the other armhaving a cam face arranged to cooperate with said shoe when said arms are movedapart to a predetermined extent, said shoe having a limited degree of movement on its support, whereby it may adapt itself to the pitch ofthe cam.

4. In ahold open device for a door, two arms, a pivot for connecting the ends of said arms, saidpivot being carried by one of the arms, a friction head at the end ofthe other arm through which said pivot freely passes, said head having a cam surface, a friction shoe carried bythe arm carrying the pivot and at one side of the latter and arranged to coperate With the cam surface on the end of the other arm.

5. In a hold open device for a door, two arms, a pivot for connecting theends of said arms, a friction head carried at the end of one of the arms and adjacent to the pivotal connection, said friction head having a cam face, a friction shoe carried by the other arm at one side of said pivot and arranged to cooperate With said cam face When said arms are swung apart to a predetermlned degree to friction-ally hold said arms in said position.

.onnrnrnnson 

